Callenish Circle was a Dutch melodic death metal band formed in 1992. They recorded three of their albums for Metal Blade Records and broke up in February 2007. In the early 2000s, things were going w
1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f07c8fcc2686dbc1dc8dcbda450fa9e29525b284d9d3c7149a76fcaac033612. Chain 2 (Bitcoin): anchored in block 953713 (2026-06-15T00:33:41Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/847d82ac-639b-4bd9-bbde-b5ff627fa54f.json and https://artists.proofprofile.net/proofs/artist/847d82ac-639b-4bd9-bbde-b5ff627fa54f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0092b82ad9dc243e108d4fa3e5b0aeb6cb98e58a0554fbcf2a834df16df19d0. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:53:04Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USMBR0704175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x469b4fa362c6e685af2a6cc882500be5cbfb2761603f81e0dd9b6f7f4950456f. Chain 2 (Bitcoin): anchored in block 958920 (2026-07-20T21:01:02Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USMBR0502104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33c22fbb01c166078398fb55da0a7447673fcb84edd0f0fd3516fe324867f78f. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USMBR0502106.